BOSTON >> Nurses and officials at Brigham and Women's Hospital are back at work and celebrating after a weekend accord avoided a one-day strike.

Nurses held a "walk in" Monday to start their work day to mark the contract settlement. Hospital leaders and Boston Mayor Marty Walsh are set to talk later Monday about how the contract impasse was resolved as employees are treated to a picnic in the park.

The two sides reached a tentative agreement on Saturday. The 3,300-member nurse's union had said the strike would have been the first by nurses in Boston in three decades. Union members must still vote on the contract before it can be finalized.

Hospital representatives had previously said among the sticking points in the contract talks were staffing levels and compensation.